Can someone help me, I´m trying to add a bill but quickbooks shows an error. "we are sorry" please contact support.

There are no open investigations similar to your issue after checking our records, Userra-ayarza. Let me help you fix it.

You might be encountering some browser hiccups. When you visit a website, the cache will store any information and will take the space on the computer's memory. If it overloads, it will cause unusual behavior.

We'll have to perform basic troubleshooting steps. Let's start with accessing QuickBooks Online through a private browser. This is the best place to isolate web issues. Here are the shortcut keys:

• Google Chrome: Ctrl + Shift + N 
• Mozilla Firefox: Ctrl + Shift + P
• Safari: Command + Shift + N

If you're able to create a bill, let's go back to your main browser, then clear its cache. It's advisable to clear them out periodically to avoid issues like this.

Also, you can use a different web browser. It could be the browser you're using has issues with our program.

You can keep us updated after trying the steps. We're just right here to help you.